A bearing rolling element with a lattice internal structure provides several advantages over a solid bearing. It is lighter than a solid bearing, reducing centrifugal forces. For ceramic bearings, less material is required, and sintering times are reduced because bonding material can flow easily to near the surface. Elements with an internal lattice also offer advantages over hollow rolling elements. The shell can be thinner without sacrificing load capacity. The thinner shell reduces the time required for bonding material to be removed during sintering. The blank can be formed using various additive manufacturing processes.

A SiC Freestanding Film Structure capable of preventing a functional surface of a SiC Freestanding Film Structure from being affected by a film thickness and improving strength by increasing the film thickness, the SiC Freestanding Film Structure is formed by depositing a SiC layer through a vapor deposition type film formation method. The SiC layer is deposited with respect to a first SiC layer serving as a functional surface in the SiC Freestanding Film Structure. Focusing on the functional surface and a non-functional surface positioned on front and back sides of any particular portion, the functional surface has smoothness higher than that of the non-functional surface.

A SiC Freestanding Film Structure capable of preventing a functional surface of a SiC Freestanding Film Structure from being affected by a film thickness and improving strength by increasing the film thickness, the SiC Freestanding Film Structure is formed by depositing a SiC layer through a vapor deposition type film formation method. The SiC layer is deposited with respect to a first SiC layer serving as a functional surface in the SiC Freestanding Film Structure. Focusing on the functional surface and a non-functional surface positioned on front and back sides of any particular portion, the functional surface has smoothness higher than that of the non-functional surface.

A method for manufacturing a concrete article is disclosed. The method comprises coating a mould or formwork with a release agent; spraying a mortar onto the mould or formwork, thereby forming a layer of mortar; casting concrete into the mould or formwork and onto the layer of mortar; and allowing the concrete to hydrate and harden in the mould or formwork, whereby a concrete article having a mortar skin layer is provided. The invention also provides concrete articles made by the described methods, and concrete structures which comprise the concrete articles. Concrete articles having the mortar skins can be made to have a relatively uniform outward appearance, even if the concrete cast behind the mortar skins may be different, in composition or appearance. Pigments or colorants and other expensive admixtures can be used in the mortar skin composition to greater visual effect, since the use of the mortar skin is less in overall volume compared to the concrete articles as a whole.

A gas turbine engine component includes a structure including spaced apart first and second exterior walls that extend in a first direction to an endwall. The first and second exterior walls are joined at the endwall to provide a cooling cavity. A wishbone baffle is arranged in the cooling cavity and includes first and second interior walls respectively adjacent to the first and second exterior walls. The first and second interior walls extend in the first direction to and are joined by an apex to provide a first cavity. The wishbone baffle separates the first cavity from a second cavity provided between the apex and the endwall.

A gas turbine engine component includes a structure including spaced apart first and second exterior walls that extend in a first direction to an endwall. The first and second exterior walls are joined at the endwall to provide a cooling cavity. A wishbone baffle is arranged in the cooling cavity and includes first and second interior walls respectively adjacent to the first and second exterior walls. The first and second interior walls extend in the first direction to and are joined by an apex to provide a first cavity. The wishbone baffle separates the first cavity from a second cavity provided between the apex and the endwall.

The invention discloses a biologically active zirconia denture has a gradient structure, the gradient structure consisting of a biomimetic nano-gradient biologically active outer surface layer, the nano-gradient outer surface layer is composed of zirconia nanocrystals and a plurality of nanopores penetrating gradiently through the layer, a micron-gradient biocompatible inner layer, the micron-gradient inner surface layer is composed of zirconia microncrystals and a plurality of micronpores penetrating gradiently through the layer, a dense micron-gradient biocompatible matrix structure, a uniform gradient transition is formed at the interface between the nano-gradient outer layer and the micron-gradient inner layer, and the micron-gradient inner layer and the matrix. The invention has the advantages of high strength, high toughness, low friction coefficient, low abrasion to the teeth, good biocompatibility and biological activity.

Provided are a method for rapidly producing a calcium phosphate molded article having high strength with high shaping precision, a calcium phosphate molded article produced by the method, and a material for transplantation. Disclosed is a method for producing a calcium phosphate molded article, the method including: step (a) of forming a layer containing a calcium phosphate powder having a ratio of the numbers of atoms of Ca/P of 1.4 to 1.8 on a substrate; and step (b) of producing a calcium phosphate molded article by jetting an organic acid solution having a pH of 3.5 or lower and including an organic acid whose calcium salt has a solubility in water of 1 g/100 mL or less, through a nozzle unit into a liquid droplet state, thereby dropping the organic acid solution onto the layer containing a calcium phosphate powder formed in step (a).

Provided are a method for rapidly producing a calcium phosphate molded article having high strength with high shaping precision, a calcium phosphate molded article produced by the method, and a material for transplantation. Disclosed is a method for producing a calcium phosphate molded article, the method including: step (a) of forming a layer containing a calcium phosphate powder having a ratio of the numbers of atoms of Ca/P of 1.4 to 1.8 on a substrate; and step (b) of producing a calcium phosphate molded article by jetting an organic acid solution having a pH of 3.5 or lower and including an organic acid whose calcium salt has a solubility in water of 1 g/100 mL or less, through a nozzle unit into a liquid droplet state, thereby dropping the organic acid solution onto the layer containing a calcium phosphate powder formed in step (a).

A method of producing a cylindrical insulator for a spark plug includes a molding step of forming ceramic powder filled in a cavity defined by a mold and a molding pin into a compact. In a first removal step of removing the compact from the mold, the compact has at least one protrusion formed in at least one recess of the molding pin formed in an outer cylindrical surface of the molding pin, and the at least one protrusion is locked in the at least one recess, thereby allowing the compact to be removed with the molding pin from the mold. In a second removal step of removing the molding pin from the compact, the molding pin is turned or rotated in the circumferential direction about the compact, causing the at least one recess to cut the at least one protrusion from the compact, and thereafter the molding pin is removed from the compact.